A little history first. While my wife of 12 years (Angel) and I were dating she would whisper in my ear during sex she wanted to be with another girl while I watched. I figured it was to get me going. Fast forward until about 5 years ago she finally admitted she was bi-curious. I encouraged her to explore that side of her sexuality and experiment with other women. Angel had a few women she played with. About a year after we switched childcare, the woman (Anne) watching our kids got comfortable with us and admitted she was bi as well. My wife and the Anne developed a very close friendship and began having a relationship on the side. I was ok with the relationship as well as her husband was, infact I encouraged it. It seemed to give Angel something that was missing that I could not give her. After a few years it turned Into a fun time for both us and the other couple. A couple times we had a 4 some with the women only interacting more than touching, aside from a double blow job for each of the men. We had a great time. We decided that we would like to try for a FMF, after a few months we met a married woman willing to join us an we had several encounters with her. Her husband liked hearing her stories of her sexual adventures so everyone had fun. All of this brings us up to tomorrow nights meet and dinner with another married couple. Angel met Jenica online, Jenica is married to James. They are interested in a hard swap. I have never shared my wife with another man. Angel has fantasies of a MFM. I will admit I have watched a few gangbang and MFM porn and it turns me on, I am just concerned that it will be a problem for me watching her be pleasured by another man in a way that until now only I have done for her. I have no concerns about emotions of jealousy over Angel leaving me for another man but rather feeling a loss of connection between us. I feel a deep emotional connection with my wife and don't want to feel like her being pleasured by another man had an effect on that. I would love to have a fun experience and fulfill Angel's fantasies. What advice do more experienced couples have to help me come to terms with my concerns?
TLDR; We have some swapping experience, and are considering a hard swap, need advice on dealing possible concerns of another man pleasuring my wife.